This is the Evergreen CBSE Chemistry Lab Manual for Class 12, prepared for the practical component of the CBSE Class XII chemistry course. It is an English medium (Roman script) book — the complete text, procedures, observation tables and viva questions are in English, and there is no Hindi content in it. The cover states that it is as per the latest guidelines of the CBSE and the New National Education Policy 2020, and web support is available.
The chemistry practical carries 30 marks in Class 12, and the marks are distributed across parts that are prepared quite differently. Volumetric analysis is a calculation to be shown correctly; salt analysis is a sequence of tests where a single wrong inference sends the student down the wrong group entirely; the content-based experiments are procedure and observation; and the project and viva are their own components.
This manual sets out each prescribed experiment in the form the examiner expects in the record file: aim, apparatus and chemicals required, theory with the working equation, procedure, observation table with the correct columns, calculation, result and precautions. The volumetric analysis section covers the standard titrations — oxalic acid and sodium hydroxide, potassium permanganate against oxalic acid and ferrous ammonium sulphate — with the normality and molarity working shown step by step. The qualitative analysis section sets out the systematic scheme for identifying cations and anions in a salt mixture, group by group, with the confirmatory tests. Also covered are surface chemistry experiments, chromatography, the preparation of inorganic and organic compounds, tests for carbohydrates, fats and proteins, and the chemical kinetics and thermochemistry experiments.
The viva voce section, arranged experiment by experiment, covers what the external examiner actually asks, and project work guidance is included. The manual is used alongside the NCERT Class 12 chemistry textbooks, which carry the theory the practicals rest on.
Key Features:
English medium book — complete content written in English (Roman script), no Hindi content
Published by Evergreen Publications
CBSE Chemistry Lab Manual for Class 12 (Class XII)
As per the latest guidelines of the CBSE and the New National Education Policy 2020
Covers all prescribed Class 12 chemistry experiments
Each experiment set out with aim, requirements, theory, procedure, observation, calculation, result and precautions
Volumetric analysis — standard titrations with normality and molarity working shown
Qualitative salt analysis — systematic scheme for cations and anions with confirmatory tests
Surface chemistry — preparation of sols and lyophilic and lyophobic colloids
Chromatography — separation of pigments and inks
Preparation of inorganic and organic compounds
Tests for carbohydrates, fats and proteins in given foodstuffs
Chemical kinetics and thermochemistry experiments
Observation tables in the format required for the practical record file
Viva voce questions with answers, arranged experiment by experiment
Project work guidance included
Web support available
For the 30-mark Class 12 chemistry practical examination
Used alongside the NCERT Class 12 chemistry textbooks
यह पुस्तक एवरग्रीन पब्लिकेशन्स द्वारा CBSE कक्षा 12 रसायन विज्ञान के प्रायोगिक पाठ्यक्रम हेतु तैयार की गई प्रयोगशाला पुस्तिका (Chemistry Lab Manual) है। ध्यान दें: यह पुस्तक पूर्णतः अंग्रेज़ी भाषा एवं रोमन लिपि में है — इसमें हिन्दी भाषा का प्रयोग नहीं है। यह CBSE के नवीनतम दिशा-निर्देशों तथा नई राष्ट्रीय शिक्षा नीति 2020 के अनुसार है। कक्षा 12 में प्रायोगिक परीक्षा 30 अंकों की होती है और इसके भाग भिन्न प्रकार से तैयार किए जाते हैं — आयतनमितीय विश्लेषण में गणना सही दिखानी होती है, जबकि लवण विश्लेषण में एक गलत अनुमान पूरे समूह को बदल देता है। इस पुस्तिका में प्रत्येक निर्धारित प्रयोग उसी प्रारूप में दिया गया है जो रिकॉर्ड फाइल में अपेक्षित है — उद्देश्य, आवश्यक उपकरण एवं रसायन, सिद्धांत एवं समीकरण, विधि, प्रेक्षण सारणी, गणना, परिणाम तथा सावधानियाँ। इसमें मानक अनुमापन (ऑक्सैलिक अम्ल एवं सोडियम हाइड्रॉक्साइड, पोटैशियम परमैंगनेट बनाम ऑक्सैलिक अम्ल एवं फेरस अमोनियम सल्फेट) चरणबद्ध गणना सहित, धनायन एवं ऋणायन की व्यवस्थित पहचान योजना, पृष्ठ रसायन, वर्णलेखिकी, कार्बनिक एवं अकार्बनिक यौगिकों का निर्माण, कार्बोहाइड्रेट-वसा-प्रोटीन के परीक्षण तथा रासायनिक बलगतिकी एवं ऊष्मारसायन के प्रयोग सम्मिलित हैं। प्रत्येक प्रयोग के साथ मौखिक परीक्षा (viva voce) प्रश्न-उत्तर तथा प्रोजेक्ट कार्य संबंधी मार्गदर्शन भी दिया गया है।
